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Cornerstone · Grades 3–5 Keystones #1 22 July 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄5

    Answer: 9⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 4 = 49

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 4:1

    Answer: 56 and 14
  5. 5. Statistics Mean

    Find the mean of: 17, 3, 11, 19

    Answer: 12.5

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